Not sure of the exact instructions of the original recipe. But you can probably follow the current instructions with the old recipe ingredients. . Here is the original ingredients.
Surly Dog IPA
2 American Ale HME
2 1/2 oz Centennial hops
1 1/2 oz. Columbus hops
1 cup honey
US-05 Dry Ale Yeast

I have used the entire can from a muntons and coopers in a LBK. I have some coopers draught in the fridge that turned out quite nice, even though it was a whole can. It does change the profile from what it was meant to be. I have not tried it with a stout or IPA style, mostly the lighter styles.